Rule 705 — Disclosing the Facts or Data Underlying an Expert’s Opinion

Fed. R. Evid. 705

• Source: Federal Rules of Evidence
• Rule: 705
• ARTICLE VII: OPINIONS AND EXPERT TESTIMONY
• Citation: Fed. R. Evid. 705

Text

Unless the court orders otherwise, an expert may state an opin-
ion—and give the reasons for it—without first testifying to the
underlying facts or data. But the expert may be required to dis-
close those facts or data on cross-examination.

Advisory Committee Notes

(As amended Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 22, 1993, eff. Dec. 1, 1993; Apr. 26, 2011, eff. Dec. 1, 2011.)